<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class='ava_box'>
                <img src="../assets/logo.png">
            </div>
            <!-- 登录表单区域 -->
            <el-form label-width="0px"
             class="login_from"
             :model="loginFrom"
             :rules='loginRules'
             ref='loginRef'>
                <!-- 用户名 -->
                <el-form-item prop='username'>
                    <el-input
                      prefix-icon="iconfont icon-user"
                      v-model="loginFrom.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop='password'>
                    <el-input
                    prefix-icon="iconfont icon-3702mima"
                    v-model="loginFrom.password"
                    type='password'></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btn_set">
                    <el-button type="primary"
                    @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginFrom">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>
<script>
export default {
  data () {
    return {
      // 登录表单的数据绑定对象
      loginFrom: {
        username: '',
        password: ''
      },
      // 表单的验证规则
      loginRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginFrom () {
    //   console.log(this)
      this.$refs.loginRef.resetFields()
    },
    login () {
      this.$refs.loginRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return false
        const { data: res } = await this.$http.post('login', this.loginFrom)
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('登陆失败')
        this.$message.success('登陆成功')
        console.log(res)
        // 保存token 使用session保存
        window.sessionStorage.setItem('token', res.data.token)
        // 通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .ava_box{
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #dddddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
        img{
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
}
//内容总体区域
.login_from{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
// 按钮区域
.btn_set{
    display: flex;
    justify-content: flex-end;
}
</style>
